Medalusa is the name of a warship in service of Gatlantis. You may be looking for:
- Medalusa (OS), leader of the White Comet Empire fleet at the Battle of Saturn in Space Battleship Yamato 2
- Medalusa-Class Heavy Battleship, a ship class of the Gatlantis Empire fleet in Space Battleship Yamato 2199: Odyssey of the Celestial Ark and Space Battleship Yamato 2202: Warriors of Love